Sealing-in machine



Nov.' 27, 1923 1,475,192 :k E. MARSHALL sEALING-IN MACHINE 'Filed April 24 m Ym v m Hrs Tranny? remet@ New. a?, ieee.

NETE@ STS @avana erster aerea..

JAMES E. MRSALL, 0F CLEVELAND, OHIO, ASSIGNOR TO GENERAL ELECTRIC COM- PANY, A CORPORATION '0F NEW YORK.

SWING-IN MACHINE.

.application le April 24, 1922. Serial No. 556,294.

T o all whom it may concern:

Be it known that l, JAMES E. MARSHALL, a citizen of the United States, residingat Cleveland, county of Cuyahoga, lState of hio, have invented certain new and useful impro ements in Sealing-lin Machines, of which he following is a specification.

My invention relates to sealing-in machines and more particularly to spindles therefor. lln application Serial No. 485,846, filed on April 24, 1919, by Mitchell and White, which is assi ed to the assignee of the present applicatiofn, there is disclosed a sealing-in machine which is particularly adapted for the sealing-in of mounts in so-called tipless incandescent lamps. My invention is an improvement on that of Mitchell and White and possesses a number of features` and advantages which will be ,apparent from the following description of an embodiment thereof.`

In the drawing, Figure 1 ist;J partial plan.

view of a sealing-in machine embodying my invention; Figure 2 is a partial vertical section of a spindle forming part of the said`machine; Fig. 3 is a horizontal section on the line 3-3 of Figure 2; Figure 4 is a perspective view of a cam-way.

The sealing-in machine of which my improved spindle forms a part, is Iof the same general type as that disclosed in the Mitchell and White application hereinbefore referred to and in Patent No. 1,011,523,0f

i December 12,1911-, granted to A. Swan, and

comprises the bed 10 having mounted thereon the rotatable frame` 11 carrying the spindles 12. The sealing-in operation comprises a series ofsteps and each spindle is c preferably rests on an caused to travel from one l osition A to another and to pause at each positionso` that the bulb and other parts will be submitted to each ofthe required operations'.

The spindle, to lwhich my invention relates, is shown in Figures 2 and 3 and is carried `by the rotatable frame 11. This spindle comprises a support for the bulb 13 which includes a collar 14 in which the bulb is centered, and suitable standards 15. These are carried by a' base lfhaving extending downwardly therefrom the hollow shaft 17 which extends through a suitable journal 18 in the frame 11. The base 16 anti-friction bearing 19 .carried by the; frame 11. The hollow shaft 17 has fastened to the lower and thereof a pulley 20 by means of whichl rotation may be given to the bulb and mount at certain points in the travel of the spindle, said pulley being engaged by the belt 21 for this purpose. At certain stages the lamp parts are submitted to the action of flames directed by burners 22 and are rotated during such operation. This is in accordance with well-known practice.

The stem 23 having attached thereto the exhaust tube 24 is of the type disclosed in Mitchell and White application, Serial No. 283,801. Asis well-known, the practice is to fuse the neck 25 of the bulb to the iiange 26 of the stem. The surplus portion 27 of the bulb neck is melted and blown off. lt is requisite to direct air against the fused portion of the neck slightly below the line of union between the stem flare and the bulb at this stage of the, operationl At the same time 'it is requisite to preserve a passage from'lthe interior of the bulb/to the atmosphere in order to allow the escape of air,

`the volume of which has been increased by the heating, from the interior of the bulb.

As, shown in the drawing, the stem rests upon a tubular mountpin 28 which receives the exhaust tube 24 and is alignedwith the hollow shaft 29 which extends through the base 16 and is keyed to shaft 17 of the ybulbsupport so that it provides an open passage extending entirely through the spindle. rThis is of advantage in two ways inasmuch as it allows the escape 1of the expanded airy from the interior of the bulb allows any broken tubes to drop through to the outside without plugging up the passage. The' lower end of the shaft 29 carries a flange 30 which engages a track31 which is shown in detail in Figure 4. The shaft `to the atmosphere and at the same time' 29 is slidable vertically and its position is determined by the track which is provided with rollers 31 upon which the Harige 30 rests during rotation of the shaft 29. rlhe when the gap 34 in the track is reached by the fiange 30, the sleeve 33 encounters the base 16 and is raised, thus allowing the balls 32 to fall back out of engagement with the tube 24. The drop of the mount support is limited by a stop 35 which engages the top of the sleeve 33.

In order to provide an air blast to blow off the bulb neck, passages are provided along the exterior of shaft 29, which carries the sleeve 36. The sleeve 37 carrying the chuck members provides passages 38 communicating with the aforesaid passages of shaft 29, and the mount pin 28 may be provided with a flange 39 spaced from the top of the member 37 in' order to furnish a proper directing means for the air blast. The air is directed intov the aforesaid passages by means of the nozzles 40, which are carried by conduits 41 suitably supported by the bed of the machine and located at the proper points in the travel of the spindle.

What I claim as new and desire to secure by Letters Patent of the United States,

supporting said .mount within said bulb comprising a hollow shaft for receiving a portion of said exhaust tube and allowing unobstructed communication therethrough from said exhaust tube to the atmosphere, a passage external of said shaft and having an outlet below the said mount and means for directing air into said passage.

3. In 'a spindle for a sealing-in machine,

a mount support comprising a straightthrough hollow shaft for receiving an ex haust tube extending from .said mount, and

means for directing air outwardly from a point below said mount comprising a passage extending parallel with that of said shaft but separated therefrom.

4. In an apparatus for sealing into a bulb a mount having a tube extending longitudinally therefrom, the combination of a support for said bulb and means for supporting said mount within said bulb comprising a hollow shaft for receiving allportion of said tube, chuck members extending tending through the sides of said shaftA andl a sleeve engaging said chuck members and supported on the exterior of said shaft and adapted to be reciprocated to release said chuck members or to force them to grip said tube.

6. In an apparatus for sealin into a bulb a mount having a tube exten ing longitu-` dinally therefrom, the combination Ywith a means for supporting said bulb with its neck extending downwardly and vertically, and means for supporting said mount within said bulb comprising a vertically` extending hollow shaft for receiving a portion of said tube, chuck members-extending through the sides of said shaft to engage said tube, a sleeve engaging said chuck members loosely mounted on said shaft and/means automatically engaging said sleeve at intervals to raise said sleeve and to cause said chuck' In witness whereof, I have hereunto set 95 my hand Ithis 21 day of April 1922.

JAMES E. MARSHALL. 

